Langer, T., Conrad, S., Fishman, L., Gerken, M., Schwarz, S., Weikert, B., . . . Weinbrenner, S. (2012). Conflicts of Interest Among Authors of Medical Guidelines: An Analysis of Guidelines Produced by German Specialist Societies. Deutscher Arzte Verlag.

Langer, Thomas, Susann Conrad, Liat Fishman, Martin Gerken, Sabine Schwarz, Beate Weikert, Günter Ollenschläger, ja Susanne Weinbrenner. Conflicts of Interest Among Authors of Medical Guidelines: An Analysis of Guidelines Produced By German Specialist Societies. Deutscher Arzte Verlag, 2012.

Langer, Thomas, et al. Conflicts of Interest Among Authors of Medical Guidelines: An Analysis of Guidelines Produced By German Specialist Societies. Deutscher Arzte Verlag, 2012.